Desktop app 26.820.71523: Local Codex chat hangs indefinitely while bundled CLI works

What version of Codex CLI is running?

0.150.0-alpha.8

What subscription do you have?

ChatGPT plus

Which model were you using?

No response

What platform is your computer?

MacBook Pro

What terminal emulator and version are you using (if applicable)?

No response

Codex doctor report

What issue are you seeing?

Environment

• ChatGPT desktop: 26.820.71523
• macOS: 26.5.2
• Bundled Codex CLI: 0.150.0-alpha.8
• Model: gpt-5.6-terra, medium reasoning

Problem

A newly created local Codex chat in the ChatGPT desktop app remains indefinitely in “Thinking”, even with the simple prompt:

只回复：测试正常

No response is displayed and the task does not complete in the desktop UI.

Expected behavior

The desktop Codex chat should immediately display:

测试正常

Control test

The bundled CLI works normally from Terminal and immediately returns the expected response:

/Applications/ChatGPT.app/Contents/Resources/codex exec --skip-git-repo-check "只回复：测试正常"

Codex Doctor findings

• Desktop app-server initialized successfully
• WebSocket connected successfully
• Authentication is configured
• State databases are healthy
• Desktop/runtime CDN is unreachable
• Bundled rg could not be found
• No failed health checks; two warnings

This appears to be a desktop UI/app-server completion-event regression rather than a model or authentication failure.

Uploaded feedback thread ID:

01a0432e-74ca-7c53-8858-d990f906564c

What steps can reproduce the bug?

Uploaded thread: 01a0432e-74ca-7c53-8858-d990f906564c

What is the expected behavior?

No response

Additional information

No response

Start with the uploaded feedback thread 01a0432e-74ca-7c53-8858-d990f906564c and reproduce the simple prompt in the ChatGPT desktop app, using the bundled CLI command as the control. Trace the desktop app-server completion event flow described in the report; done means the desktop chat displays “测试正常” and completes instead of remaining in “Thinking”.